Pension Plan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Pension Plan (Details) [Line Items]
Liability, Defined Benefit Pension Plan, Current	$ 640,000	$ 641,000
Liability, Defined Benefit Pension Plan, Noncurrent	3,300,000	3,500,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	641,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 85,000
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 556,000